diff --git a/schema/language_ids.go b/schema/language_ids.go
index 970cf184..d0dfe28c 100644
--- a/schema/language_ids.go
+++ b/schema/language_ids.go
@@ -6,6 +6,6 @@
 package schema
 
 const (
-	ModuleLanguageID    = "terraform"
-	VariablesLanguageID = "terraform-vars"
+	ModuleLanguageID    = "opentofu"
+	VariablesLanguageID = "opentofu-vars"
 )
diff --git a/schema/module_schema.go b/schema/module_schema.go
index 939c871d..b64db491 100644
--- a/schema/module_schema.go
+++ b/schema/module_schema.go
@@ -224,7 +224,7 @@ func schemaForDependentModuleBlock(module module.DeclaredModuleCall, modMeta *mo
 		bodySchema.Targets = &schema.Target{
 			Path: lang.Path{
 				Path:       modMeta.Path,
-				LanguageID: "terraform",
+				LanguageID: "opentofu",
 			},
 			Range: hcl.Range{
 				Filename: filename,
diff --git a/schema/module_schema_test.go b/schema/module_schema_test.go
index b277bb5b..79b01ef2 100644
--- a/schema/module_schema_test.go
+++ b/schema/module_schema_test.go
@@ -97,7 +97,7 @@ func TestSchemaForDependentModuleBlock_basic(t *testing.T) {
 					},
 					Path: lang.Path{
 						Path:       "./local",
-						LanguageID: "terraform",
+						LanguageID: "opentofu",
 					},
 					Constraints: schema.Constraints{
 						ScopeId: "variable",
@@ -115,7 +115,7 @@ func TestSchemaForDependentModuleBlock_basic(t *testing.T) {
 					},
 					Path: lang.Path{
 						Path:       "./local",
-						LanguageID: "terraform",
+						LanguageID: "opentofu",
 					},
 					Constraints: schema.Constraints{
 						ScopeId: "variable",
@@ -183,7 +183,7 @@ func TestSchemaForDependentModuleBlock_basic(t *testing.T) {
 					lang.RootStep{Name: "output"},
 					lang.AttrStep{Name: "first"},
 				},
-				Path:        lang.Path{Path: "./local", LanguageID: "terraform"},
+				Path:        lang.Path{Path: "./local", LanguageID: "opentofu"},
 				Constraints: schema.Constraints{ScopeId: "output"},
 			},
 			{
@@ -196,7 +196,7 @@ func TestSchemaForDependentModuleBlock_basic(t *testing.T) {
 					lang.RootStep{Name: "output"},
 					lang.AttrStep{Name: "second"},
 				},
-				Path:        lang.Path{Path: "./local", LanguageID: "terraform"},
+				Path:        lang.Path{Path: "./local", LanguageID: "opentofu"},
 				Constraints: schema.Constraints{ScopeId: "output"},
 			},
 		},
@@ -266,7 +266,7 @@ func TestSchemaForDependentModuleBlock_Target(t *testing.T) {
 					},
 				},
 				Targets: &schema.Target{
-					Path: lang.Path{Path: "./local", LanguageID: "terraform"},
+					Path: lang.Path{Path: "./local", LanguageID: "opentofu"},
 					Range: hcl.Range{
 						Filename: "a_file.tf",
 						Start:    hcl.InitialPos,
@@ -298,7 +298,7 @@ func TestSchemaForDependentModuleBlock_Target(t *testing.T) {
 					},
 				},
 				Targets: &schema.Target{
-					Path: lang.Path{Path: "./local", LanguageID: "terraform"},
+					Path: lang.Path{Path: "./local", LanguageID: "opentofu"},
 					Range: hcl.Range{
 						Filename: "main.tf",
 						Start:    hcl.InitialPos,
diff --git a/schema/schema_merge_v015_test.go b/schema/schema_merge_v015_test.go
index c244d36c..544faca9 100644
--- a/schema/schema_merge_v015_test.go
+++ b/schema/schema_merge_v015_test.go
@@ -449,7 +449,7 @@ var moduleWithDependency = schema.BlockSchema{
 						},
 						Path: lang.Path{
 							Path:       "path",
-							LanguageID: "terraform",
+							LanguageID: "opentofu",
 						},
 						Constraints: schema.Constraints{
 							ScopeId: "variable",
@@ -537,7 +537,7 @@ var expectedRemoteModuleSchema = &schema.BlockSchema{
 						},
 						Path: lang.Path{
 							Path:       ".terraform/modules/remote-example",
-							LanguageID: "terraform",
+							LanguageID: "opentofu",
 						},
 						Constraints: schema.Constraints{
 							ScopeId: "variable",
diff --git a/schema/variable_schema_test.go b/schema/variable_schema_test.go
index 3b78db0c..5547e3b2 100644
--- a/schema/variable_schema_test.go
+++ b/schema/variable_schema_test.go
@@ -46,7 +46,7 @@ func TestSchemaForVariables(t *testing.T) {
 					Constraint: schema.LiteralType{Type: cty.String},
 					OriginForTarget: &schema.PathTarget{
 						Address:     schema.Address{schema.StaticStep{Name: "var"}, schema.AttrNameStep{}},
-						Path:        lang.Path{Path: "./local", LanguageID: "terraform"},
+						Path:        lang.Path{Path: "./local", LanguageID: "opentofu"},
 						Constraints: schema.Constraints{ScopeId: "variable", Type: cty.String},
 					},
 				},
@@ -76,7 +76,7 @@ func TestSchemaForVariables(t *testing.T) {
 					Constraint: schema.LiteralType{Type: cty.String},
 					OriginForTarget: &schema.PathTarget{
 						Address:     schema.Address{schema.StaticStep{Name: "var"}, schema.AttrNameStep{}},
-						Path:        lang.Path{Path: "./local", LanguageID: "terraform"},
+						Path:        lang.Path{Path: "./local", LanguageID: "opentofu"},
 						Constraints: schema.Constraints{ScopeId: "variable", Type: cty.String},
 					},
 				},
@@ -90,7 +90,7 @@ func TestSchemaForVariables(t *testing.T) {
 					IsRequired:  true,
 					OriginForTarget: &schema.PathTarget{
 						Address:     schema.Address{schema.StaticStep{Name: "var"}, schema.AttrNameStep{}},
-						Path:        lang.Path{Path: "./local", LanguageID: "terraform"},
+						Path:        lang.Path{Path: "./local", LanguageID: "opentofu"},
 						Constraints: schema.Constraints{ScopeId: "variable", Type: cty.Number},
 					},
 				},